FR65821E - - Google Patents
Info
- Publication number
- FR65821E FR65821E FR65821DA FR65821E FR 65821 E FR65821 E FR 65821E FR 65821D A FR65821D A FR 65821DA FR 65821 E FR65821 E FR 65821E
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
- H01J40/02—Details
- H01J40/04—Electrodes
- H01J40/06—Photo-emissive cathodes
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR65821E true FR65821E (2) | 1956-03-21 |
Family
ID=1363913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR65821D Expired FR65821E (2) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR65821E (2) |
-
0
- FR FR65821D patent/FR65821E/fr not_active Expired